編寫一個類實現銀行賬戶的概念，包含的屬性有“帳號”、“密碼”、“存款餘額”、“利率”、“最小余額”，定義封裝這些屬性的方法。賬號要自動生成。
編寫主類，使用銀行賬戶類，輸入、輸出3個儲戶的上述信息。
Account類：
public class Account {
private static int id=1000;//賬號
private String passWord;
private double balance;//餘額
private static double minBalance=100;//最小余額
private static double annualInterestRate=0.045;//年利率
public Account(){
}
public Account(String passWord, double b){
this.passWord=passWord;
this.balance=b;
}
public static double getMinBalance() {
return minBalance;
}
public static void setMinBalance(double minBalance) {
Account.minBalance = minBalance;
}
public String getPassWord() {
return passWord;
}
public void setPassWord(String passWord) {
this.passWord = passWord;
}
public static int getId(){
id++;
return id;
}
public static void setId( int i){
Account.id=i;
}
public double getBalance(){
return balance;
}
public void setBalance(double b){
this.balance=b;
}
public static double getAnnualInterestRate(){
return annualInterestRate;
}
public static void setAnnualInterestRate(double a){
Account.annualInterestRate=a;
}
//獲取月利率
public double getMonthlyInterest(){
return (double)annualInterestRate/12;
}
public double withdraw (double amount){//取款方法
if(balance>amount){
balance-=amount;
System.out.println("成功取出"+amount+"元");
return balance;
}else{
System.out.println("餘額不足！取款失敗！");
System.out.println("您的賬戶餘額爲："+balance+"元");
return balance;
}
}
public void deposit (double amount){//存款方法
balance+=amount;
System.out.println("成功存入了"+amount+"元");
System.out.println("現在賬戶裏有"+balance+"元");
}
}TestAccount類：
public class TestAccount {
public static void main(String[] args) {
Account account1 = new Account( "123456", 500.00);
Account account2 = new Account( "1234567", 400.00);
Account account3 = new Account( "12345678", 300.00);
System.out.println("第一個客戶賬戶信息爲：");
System.out.println("賬戶ID：" + Account.getId() + "賬戶密碼："
+ account1.getPassWord() + "賬戶餘額：" + account1.getBalance()
+ "年利率：" + Account.getAnnualInterestRate() + "最小余額："
+ Account.getMinBalance());
System.out.println("第二個客戶賬戶信息爲：");
System.out.println("賬戶ID：" + Account.getId() + "賬戶密碼："
+ account2.getPassWord() + "賬戶餘額：" + account2.getBalance()
+ "年利率：" + Account.getAnnualInterestRate() + "最小余額："
+ Account.getMinBalance());
System.out.println("第三個客戶賬戶信息爲：");
System.out.println("賬戶ID：" + Account.getId() + "賬戶密碼："
+ account3.getPassWord() + "賬戶餘額：" + account3.getBalance()
+ "年利率：" + Account.getAnnualInterestRate() + "最小余額："
+ Account.getMinBalance());
}
}運行結果爲：
第一個客戶賬戶信息爲：
賬戶ID：1001賬戶密碼：123456賬戶餘額：500.0年利率：0.045最小余額：100.0
第二個客戶賬戶信息爲：
賬戶ID：1002賬戶密碼：1234567賬戶餘額：400.0年利率：0.045最小余額：100.0
第三個客戶賬戶信息爲：
賬戶ID：1003賬戶密碼：12345678賬戶餘額：300.0年利率：0.045最小余額：100.0